Heavy Vintage Sterling Silver Herringbone Collar Necklace

A gorgeous - and heavy - vintage solid sterling silver herringbone collar necklace which weighs in at 67 grams. I have no idea of the origin of the necklace as it has no markings that I can see - but it does test as sterling silver. Although chunky - it measures 1/8 inch in thickness - and quite heavy, it is so flexible and smooth, it almost has the fluidity of a snake.

The Necklace measures 16 7/8 inches long and 1/4 inch wide and fastens with a hook clasp.